Sinofsky

In a rather unexpected shakeup, Steven Sinofsky — the head of Windows — has departed from Microsoft, effective immediately. He is succeeded by Julie Larson-Green (Sinofsky’s second-in-command and head of UX for Windows 7 and Windows 8), and Tami Reller — the Windows CFO — will see her role expand to encompass “the business of Windows.”

We only now are understanding to what lengths Microsoft went to keep its highly-anticipated tablet announcement under wraps until Monday. Even its closet partners and many employees were left in the dark, it seems.